Finding the Fourth Proportional to 81,435.30, 112,385.33 and 45,636.86

Step by Step Solution

1. Step 1: Write the proportion equation
   81,435.30 : 112,385.33 = 45,636.86 : x
2. Step 2: Convert to fraction form
   81,435.30/112,385.33 = 45,636.86/x
3. Step 3: Cross multiply
   81,435.30x = 112,385.33 × 45,636.86
4. Step 4: Simplify right side
   81,435.30x = 5,128,912,781.15
5. Step 5: Solve for x
   x = 5,128,912,781.15/81,435.30
6. Step 6: Final answer
   x = 62,981.44